buildroot/package/qt5/qt5x11extras/Config.in

config BR2_PACKAGE_QT5X11EXTRAS
	bool "qt5x11extras"
	depends on BR2_PACKAGE_QT5BASE_XCB
	select BR2_PACKAGE_QT5BASE_WIDGETS
	help
	  Qt is a cross-platform application and UI framework for
	  developers using C++.

	  Qt X11 Extras enables the Qt programmer to write
	  applications for the Linux/X11 platform.

	  http://doc.qt.io/qt-5/qtx11extras-index.html